BLUETOOTH(3) NetBSD Library Functions Manual BLUETOOTH(3)
NAMEbt_gethostbyname, bt_gethostbyaddr, bt_gethostent, bt_sethostent,
bt_endhostent, bt_getprotobyname, bt_getprotobynumber, bt_getprotoent,
bt_setprotoent, bt_endprotoent, bt_aton, bt_ntoa, bt_devaddr, bt_devname,
-- Bluetooth routines
LIBRARY
Bluetooth Host Lookup Library (libbluetooth, -lbluetooth)
SYNOPSIS#include <bluetooth.h>struct hostent *bt_gethostbyname(const char *name);
struct hostent *bt_gethostbyaddr(const char *addr, int len, int type);
struct hostent *bt_gethostent(void);
voidbt_sethostent(int stayopen);
voidbt_endhostent(void);
struct protoent *bt_getprotobyname(const char *name);
struct protoent *bt_getprotobynumber(int proto);
struct protoent *bt_getprotoent(void);
voidbt_setprotoent(int stayopen);
voidbt_endprotoent(void);
intbt_aton(const char *str, bdaddr_t *ba);
const char *bt_ntoa(const bdaddr_t *ba, char *str);
intbt_devaddr(const char *name, bdaddr_t *addr);
intbt_devname(char *name, const bdaddr_t *addr);
DESCRIPTION
The bt_gethostent(), bt_gethostbyname(), and bt_gethostbyaddr() functions
each return a pointer to an object with the hostent structure describing
a Bluetooth host referenced by name or by address, respectively.
The name argument passed to bt_gethostbyname() should point to a
NUL-terminated hostname. The addr argument passed to bt_gethostbyaddr()
should point to an address which is len bytes long, in binary form (i.e.,
not a Bluetooth BD_ADDR in human readable ASCII form). The type argument
specifies the address family of this address and must be set to
AF_BLUETOOTH.
The structure returned contains the information obtained from a line in
/etc/bluetooth/hosts file.
The bt_sethostent() function controls whether /etc/bluetooth/hosts file
should stay open after each call to bt_gethostbyname() or
bt_gethostbyaddr(). If the stayopen flag is non-zero, the file will not
be closed.
The bt_endhostent() function closes the /etc/bluetooth/hosts file.
The bt_getprotoent(), bt_getprotobyname(), and bt_getprotobynumber()
functions each return a pointer to an object with the protoent structure
describing a Bluetooth Protocol Service Multiplexor referenced by name or
number, respectively.
The name argument passed to bt_getprotobyname() should point to a
NUL-terminated Bluetooth Protocol Service Multiplexor name. The proto
argument passed to bt_getprotobynumber() should have numeric value of the
desired Bluetooth Protocol Service Multiplexor.
The structure returned contains the information obtained from a line in
/etc/bluetooth/protocols file.
The bt_setprotoent() function controls whether /etc/bluetooth/protocols
file should stay open after each call to bt_getprotobyname() or
bt_getprotobynumber(). If the stayopen flag is non-zero, the file will
not be closed.
The bt_endprotoent() function closes the /etc/bluetooth/protocols file.
The bt_aton() routine interprets the specified character string as a
Bluetooth address, placing the address into the structure provided. It
returns 1 if the string was successfully interpreted, or 0 if the string
is invalid.
The routine bt_ntoa() takes a Bluetooth address and places an ASCII
string representing the address into the buffer provided. It is up to
the caller to ensure that provided buffer has enough space. If no buffer
was provided then an internal static buffer will be used.
The bt_devaddr() function interprets the specified character string as
the address or device name of a Bluetooth device on the local system, and
places the device address in the structure provided, if any. It returns
1 if the string was successfully interpreted, or 0 if the string did not
match any local device. The bt_devname() function takes a Bluetooth
device address and copies the local device name associated with that
address into the buffer provided, if any. It returns 1 when the device
was found, otherwise 0.
FILES
/etc/bluetooth/hosts
/etc/bluetooth/protocols
EXAMPLES
Print out the hostname associated with a specific BD_ADDR:
const char *bdstr = "00:01:02:03:04:05";
bdaddr_t bd;
struct hostent *hp;
if (!bt_aton(bdstr, &bd))
errx(1, "can't parse BD_ADDR %s", bdstr);
if ((hp = bt_gethostbyaddr((const char *)&bd,
sizeof(bd), AF_BLUETOOTH)) == NULL)
errx(1, "no name associated with %s", bdstr);
printf("name associated with %s is %s\n", bdstr, hp->h_name);
DIAGNOSTICS
Error return status from bt_gethostent(), bt_gethostbyname(), and
bt_gethostbyaddr() is indicated by return of a NULL pointer. The exter-
nal integer h_errno may then be checked to see whether this is a tempo-
rary failure or an invalid or unknown host. The routine herror(3) can be
used to print an error message describing the failure. If its argument
string is non-NULL, it is printed, followed by a colon and a space. The
error message is printed with a trailing newline.
The variable h_errno can have the following values:
HOST_NOT_FOUND No such host is known.
NO_RECOVERY Some unexpected server failure was encountered. This is
a non-recoverable error.
The bt_getprotoent(), bt_getprotobyname(), and bt_getprotobynumber()
return NULL on EOF or error.
SEE ALSOgethostbyaddr(3), gethostbyname(3), getprotobyname(3),
getprotobynumber(3), herror(3), inet_aton(3), inet_ntoa(3)HISTORYlibbluetooth first appeared in FreeBSD was ported to NetBSD 4.0 and
extended by Iain Hibbert for Itronix, Inc.
AUTHORS
Maksim Yevmenkin <m_evmenkin@yahoo.com>
Iain Hibbert
CAVEATS
The bt_gethostent() function reads the next line of /etc/bluetooth/hosts,
opening the file if necessary.
The bt_sethostent() function opens and/or rewinds the
/etc/bluetooth/hosts file.
The bt_getprotoent() function reads the next line of
/etc/bluetooth/protocols, opening the file if necessary.
The bt_setprotoent() function opens and/or rewinds the
/etc/bluetooth/protocols file.
BUGS
These functions use static data storage; if the data is needed for future
use, it should be copied before any subsequent calls overwrite it.
NetBSD 5.0.1 July 26, 2006 NetBSD 5.0.1

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